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.TH AIO.H 3HEAD "Feb 5, 2008"
.SH NAME
aio.h, aio \- asynchronous input and output
.SH SYNOPSIS
.LP
.nf
\fB#include <aio.h>\fR
.fi

.SH DESCRIPTION
.sp
.LP
The <\fBaio.h\fR> header defines the \fBaiocb\fR structure which includes the
following members:
.sp
.in +2
.nf
int               aio_fildes       file descriptor
off_t             aio_offset       file offset
volatile void*    aio_buf          location of buffer
size_t            aio_nbytes       length of transfer
int               aio_reqprio      request priority offset
struct sigevent   aio_sigevent     notification type
int               aio_lio_opcode   listio operation
.fi
.in -2

.sp
.LP
This header also includes the following constants:
.sp
.ne 2
.na
\fB\fBAIO_ALLDONE\fR\fR
.ad
.RS 19n
A return value indicating that none of the requested operations could be
canceled since they are already complete.
.RE

.sp
.ne 2
.na
\fB\fBAIO_CANCELED\fR\fR
.ad
.RS 19n
A return value indicating that all requested operations have been canceled.
.RE

.sp
.ne 2
.na
\fB\fBAIO_NOTCANCELED\fR\fR
.ad
.RS 19n
A return value indicating that some of the requested operations could not be
canceled since they are in progress.
.RE

.sp
.ne 2
.na
\fB\fBLIO_NOP\fR\fR
.ad
.RS 19n
A \fBlio_listio\fR(3C) element operation option indicating that no transfer is
requested.
.RE

.sp
.ne 2
.na
\fB\fBLIO_NOWAIT\fR\fR
.ad
.RS 19n
A \fBlio_listio()\fR synchronization operation indicating that the calling
thread is to continue execution while the \fBlio_listio()\fR operation is being
performed, and notification is to be given when the operation is complete.
.RE

.sp
.ne 2
.na
\fB\fBLIO_READ\fR\fR
.ad
.RS 19n
A \fBlio_listio()\fR element operation option requesting a read.
.RE

.sp
.ne 2
.na
\fB\fBLIO_WAIT\fR\fR
.ad
.RS 19n
A \fBlio_listio()\fR synchronization operation indicating that the calling
thread is to suspend until the \fBlio_listio()\fR operation is complete.
.RE

.sp
.ne 2
.na
\fB\fBLIO_WRITE\fR\fR
.ad
.RS 19n
A \fBlio_listio()\fR element operation option requesting a write.
.RE

.SH SEE ALSO
.sp
.LP
.BR lseek (2),
.BR read (2),
.BR write (2),
.BR fsync (3C),
.BR lio_listio (3C),
.BR libaio (3LIB)
